Riveting-tool or dolly-bar.



M. NOAK.

RIVETING TOOL 0R DOLLY BAR.

APPLICATION FILED MAYH. 19I5.

Patented Aug. 31, 1915.

titan srarrns name a onnio MARTIN NOAK, OF PITTSBURGH, PENNSYLVANIA.

RIVETING-TOGL OB DOLLYBAB-.

Specification of Letters latcnt. Patented Aug. 31, 1915,

Application filed. May 11, 1915. Serial No. 27,361.

is a specification.

My invention relates to the class'of riveting tools known as dolly-barsand used in bucking upor holding rivets in position in the registeringholes of the materials being connected by engagement 'of the head on oneend of the rivet while a head is being formed on the other end of therivet to secure together the materials being riveted.

The invention more particularly relates to a dolly-bar used in coldriveting, in riveting sheeting, corrugated iron and similar lightmaterials with which the rivets used are soft metal rivets which areupset or are headed while cold. Such rivets usually are short and ofsmall diameter and on account of the lack of length are difli'cult toinsert in the registering openings or holes, the fingers of the workmengenerally being thick and clumsy. In inserting such rivets it has beenthe practice to position the rivet with one hand and to bring thedolly-bar into engagement with the head on one end with the other handof the workman, generally known as a bucker-up.

One object of my invention is to provide a tool of the class describedhaving novel means for detachably holding the rivets on the dolly-barand thereby enabling the dollybar to be used in positioning the rivetsin the rivet holes preparatory to forming a second head on one end ofthe rivet, as is done in such riveting operations.

Still further objects of my invention will appear as the novelconstruction and arrangement of the parts are more fully describedhereinafter and specifically pointed out in the appended claims.

Referring now to the drawings forming part of this specification, Figure1 is a plan partly in section showing a dolly-bar constructed andarranged in accordance with my invention. Fig. 2 is an end elevation ofthe dolly-bar shown in Fig. 1. Fig. 3 is a side elevation of one end ofthe dolly-bar showing the yielding means by which the rivets aredetachably held in position on the dolly-bar in applying the rivets tothe holes in which they are to be upset or headed. Fig. a is a planshowing a modification in the construction of dolly-bars made inaccordance with this invention.

In the accompanying drawings, the numeral 2 designates the stem or shaftofthe dollybar having heels 3 and 4 on the ends thereof, one of thefaces 5 and 6 defining the ends of the dolly-bar'being held inengagement with the head of the rivet while the rivet is being upset toform the second head.

thereon. In one of these faces 5 is a slot or recess 7 of a depth whichis approximately equal to or slightly greater than the thickness of theflat head rivets, which is the type of rivet with which the dolly-bar ofmy invention is particularly adapted for use.

On the side face 8 of the heel 3 of the dolly-bar is a slot or recess 9which connects into the open end of the recess 7 in the face 5 of thedolly-bar and removably secured at one end in the groove 9 is a spring10 having a bent outer end 11 which extends into the slot 7 in the endof the dolly-bar. The fixed end of the spring 10 is removably secured tothe dolly-bar by means of a cap screw 12.

In the modified construction shown in Fig. 4 the anvil or heel 5 of thedolly-bar has a reduced shank 13 by which the heel is detachably securedon the stem 2*, pieces of wrought metal pipe of convenient length beingconveniently used to form the detachable stems. Tn this construction theshoulder formed at the junction of the shank 13 with the heel 5 formsmeans against which the end of the pipe engages when the dollybar is inuse.

In the use of my improved apparatus the fiat head of the rivet 14 isplaced in the recess 7 in the face 5 of the heel 3 and the edge of thebent end of the spring engages with its head and yieldingly holds therivet on end on the dolly-bar. The dolly-bar is then used in pilotingthe rivet into the registering holes in which it is to be upset. Whenthe rivet is within the holes the buckerup will hold the rivet by meansof the dolly bar while the riveter is upsetting the other end of therivet to form a head, in the usual known manner. After the end of therivet has been upset to such an extent that it will not drop out of theholes in which it is positioned, the other portion of the face of theheel or anvil 3 is -brought into engagement with the rivet head.

The advantages of my invention, which Will be appreciated by thoseskilled in the in place by manipulation of the dolly-bar.

Theinsertion of short rivets into the rivet holes is 1 facilitated andthe v liability of pinching or otherinjury to the fingers of the workmenasofttnnes occurs when the rivet is inserted with one hand While thedolly-baris brought into holding position With the other in the mannerheretofore employed, is avoided and overcome.

Modifications in the construction and arrangement of the parts may bemade Withset my hand.

MARTIN NOAK. Witnesses v Crnmnns C. HILL, S. L. NnnLY.

Hi 7 Copies of this patent may be obtained for five cents each, byaddressing" the Commissioner of Patents,

' c Washington, D. C.

